x³-6x²;+9x=0,x1= x2=?x3=?

x³-6x²;+9x=0,x1= x2=?x3=?
x³-6x²;+9x=0,x1= x2=?x3=?

x³-6x²;+9x=0,x1= x2=?x3=?
x³-6x²+9x=0
x(x²-6x+9）=0
x(x-3）²=0
x1=0
x2=x3=3

x³-6x²+9x=0
x(x^2-6x+9)=0
x(x-3)^2=0
x1=0,x2=3,x3=3

x1=0 x2=3 x3=3

x³-6x²+9x=0，x1= 0，x2=x3=3

解x(x平方-6x+9)=o
解得x1=0 x2=-3